Lasting-jack for boots and shoes



' (No Model.) 2 SheetsSheet l.

P. CHASE.

LASTING JAGK FOR BOOTS 'AND SHOES.

Patented Feb; 5, 1884,,

' ijz'z/e zio rx- N. PETERS. Phm-Limu n her. Washmglom D. C.

2 Sheets-Sheet 2..

( NoModeL) .I'.OHASB. LASTING JACK FOR BOOTS ANDSHOES No. 293,146.

'. Patented Feb. 5, 1884.

UNr'rso rarns ATENT tries.

LASTiNG-JACK FOR BOOTS AND SHOES.

SPEGIFTCAI'ION forming part of Letters Patent No. 293,146, dated February 5,1884.

Application filed December 1, 1883. (X model.)

To all whom it may concern.-

Be it known that I, FRANK. CHASE, of Boston, in the State of Massachusetts, have invented a certain new and Improved Lastingjack, and to means for-causing the upper to conform to the shank or other irregularlyshaped portion of the last; and it can be best explained and understood by reference to the these trunnions as an axis.

accompanyingdrawings, in which Figure 1 is aside elevation of a jack embodying the invention, representing also a last held in place therein. Fig. 2 is a plan. Fig. 3 is an end elevation of the same. Fig. 4 is a side elevation of the last-holding devices proper, detached from the other portions of the jack.

A is the supporting-yoke, which is swiveled .in-the top of a standard, B, which may be .made capable of varied movement, as in ordinary lasting-jacks. In this yoke is hung, by end trunnions, a, an outer frame, C, which is capable of oscillating from side to side on lVithin this frame is hung on trunnions d the last-holding frame proper, D, capable of endwise rocking or tilting movement on trunnions d as an axis. These trunnions are supported in half-bearings 1), formed on the inner faces of the outer frame, G, with a view to permit the last-holding frame D, with its appurtenances, to be readily fitted into and removed from the outer frame. \Vhen the trunnions are in their halfbearings, they can be prevented from rising by means of centering thumb-screws b, as indicated in Fig. 2. At the front or open end of the jack-holding frame D is a cross-shit, c, on which is mounted a pinion, d.

piece/Z and which is pivoted to the pinion near the rim by a pin, 0, that passes through the pinion and through ears 0' on the back of the toe-piece. Below cross-shaft c is asecond shaft 'or arbor, f, connected to c by a link, 9. From arbor f extends another link, 71, to an arbor, t, on which ishung, so as to swivel thereon, the heel-post F, which is prolonged below arbor '5 to form a handle, F, by which the last can be moved according to the re- The atter carries a device, E, which 1 term a toequirements of the work as permitted by the joints a (Z. The links 9 and h are of course swiveled on the arbors to which they are respectively connected. On the arbor f is a toothed sector, 7', the toothed part of which will mesh with the pinion d.

- The toe-piece E is preferably made of thin steel, so as to be flexible, in order to conform to different sizes of lasts, and is lined, as to that portion of it which comes in contact with the upper, with a soft-vulcanizedrubber cont pound. V

v To the sector-gearj is rigidly secured a handle, j, and on the link It is a ratel1et,k which is engaged by a spring-controlled pawl, It, on the lever-handle.

The jack-holding frame D is provided with a heel-stop, Z, to limit the extent to which the heel of the last can rise in the frame.

The operation of the parts thus far described is as follows: The toe-piece E is thrown forward by hand, so as to remove it entirely out of the way, which movement is readily permitted if the sector-gear be thrown out of engagement with the pinion d. The last, with the upper upon it, is then set down in place in the jack-holding frame upon the heel-post F, which, as usual, enters a socket formed for it in the last. The toe-piece is now brought up by hand into position against the last and the upper, and when this is done the lever-handle j is pressed down, with the effect of throwing the sector-gear into mesh with the pinion, and of causing the two to rotate in such direction as to straighten, or tend to straighten, the knuckle-j oint formed by the links h and g, with the effect of pressing the last'back against the rear of the frame D, and of then clamping it most powerfully and firmly, through the combined agency of the frame, the heel-.post, and the toe-piece. The pawl and ratchet k and L hold the parts in any position to which they.v

may be brought.

The foregoing operation may be performed either in the jack represented in the drawings or in a jack specially provided for the purpose, in which the last-holding frame and its appurtenances would be temporarily placed. Inthe latter case, after the completion of the jacking operation above described, the frame D and its appurtenances, together with the jacked last, would be removed from the special jack, and would be set into the outer frame, 0, of the jack represented in the drawings.

It remains to describe the means for causing the upper to conform to the shank of the last.

On each side of the jack-holding frame D, at a point about opposite to where the shank of the last would naturally come, are one or more pressers, G, provided with stems or shanks G, which extend through and are adapted to slide in bearings Z in frame D, so as to permit the pressers to approach and recede from the last. I have represented only one presser on each side; but two or more may be used, if desired; These pressers, whose faces are shaped to conform, approximately, to

portions of the last against which they operate,

may act directly upon the last; but it is preferred that they should act thereon indirectly, through the medium of an interposed rubber lining, m, of requisite thickness, which is attached to the interior of the last-holding frame D at the points 1 and 2. In Fig. 2 this lining is represented in the position which it assumes when forced inwardly against the last by the pressers.

It is manifest that in operating on lasts of various kinds and shapes-such, for instance, as rights, lefts, and straightsthe pressers will not always move the same distance, and that one will very often move farther than the other. It becomes therefore desirable to provide an instrumentality which, while operating simultaneously pressers upon both sides of the frame D, will permit the one presser or set of pressers to move farther than the other, according to the requirements of the work. A convenient instrumentality for this purpose is represented in the drawings. It consists of a cord, belt, or chain, 0, which passes around the top of the frame 0 upon pulleys or grooved guide-rollers p thereon,=

and also upon the exterior of guide-rollers 1-, which are mounted on flexible or spring-like arms 8, arranged within the outer frame at points opposite the projecting stems of the pressers G, and secured to said frame at their lower ends. The cord or belt 0 is attached at its ends to the peripheries of wheels t, which take their bearings in the front part of outer frame, 0. To the hubs of these wheels is made fast a forked leverhandl'e, H. By depressing this handle the wheels 25 will be rotated in a direction to tighten the belt 0, with the result of forcing inwardly the rollers r, and of causing the arms 3 to bear on the stems G, and to force the presser G toward and against the last, as indicated in Fig. 2. I

By means of a pawl, 3, on frame 0, and a ratchet-wheel, 4, on the lever-handle H, the shaft can be held in any position to which it may be brought by depressing the handle. Under this arrangement it will be seen that while both pressers are moved simultaneously the belt, by its slip upon its guide-rollers, will permit and compensate for differences in the extent of movement of the respective pressers.

Having described my improvement and the manner in which the same is or may be carried into effect, what I claim as new and of piece is .pivoted, the sector-gear, and means for locking the links in the position to which they may be brought by the rotation of said sector-gear, the combination being and acting as hereinbefore set forth.

3. The last-holding frame proper, and the heel-post and toe-piece and system of connecting links and gears carried by said frame, in

combination with theouter frame, in which said last-holding frame is hung by side trunnions, and the yoke in which said outer frame is hung by end trunnions, substantially as and for the purposes hereinbefore set forth.

4. The combination, with the last-holding frame proper and the pressers movable independently of said frame, of mechanism arranged and operating, substantially as herein before set forth, to act directlyand simulta neously upon said pressers, and at the same time to permit differences in the extent of movement of the individual pressers, as and for the purposes described.

5. The combination, with the last-holding frame, the pressers, and the presser-actuating mechanism, of the lining carried by the lastholding frame and interposed between the FRANK. CHASE.

\Vitnesses:

EWELL A. DICK, J. WALTER BLAXDFORD.

IIO 

